Water hardness in Gengenbach
5.3 °dH moderately hard
Tap water in Gengenbach is moderately hard: 5.3 °dH (95 mg/L · 5.5 gpg · 9.5 °fH).
Source: Stadtwerke Gengenbach - Wasserhärte in Gengenbach (Wasseranalyse vom 12.05.2026) (2026-05) · data checked 2026-11-03
Stadtwerke Gengenbach published a water analysis dated 12 May 2026 showing 5.3 °dH (94.6 mg/L CaCO₃), which falls in the soft range under the German Washing and Cleaning Agents Act. The same document covers both Gengenbach and Reichenbach, and no split by supply zone is shown. Because it is a single analysis rather than an annual mean, a later sample can differ slightly.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 5.3 °dH |
|---|---|
| Utility | Stadtwerke Gengenbach |
How Gengenbach compares
- Tap water in Gengenbach is 54 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 725 of 809 in Germany (1 = hardest); 10 % of these cities have softer water.
- In Baden-Württemberg it is number 135 of 146 cities; the regional median is 12.8 °dH.
- Nearest city with clearly softer water: Lahr/Schwarzwald, 12 km away (4.2 °dH).
- Nearest city with clearly harder water: Schutterwald, 8 km away (12.6 °dH).
Ranking of the hardest and softest water in Germany →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Gengenbach
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Gengenbach water hard or soft?
It is moderately hard: 95 mg/L as CaCO₃ (5.5 gpg, 5.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Gengenbach safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
How many grains per gallon is Gengenbach water?
5.5 gpg, equal to 5.3 °dH, 9.5 °fH or 95 mg/L calcium carbonate.
What dishwasher salt setting should I use in Gengenbach?
For 95 mg/L (5.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Gengenbach?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Stadtwerke Gengenbach - Wasserhärte in Gengenbach (Wasseranalyse vom 12.05.2026) (2026-05). Method: figure published by the water supplier. Stadtwerke Gengenbach - Wasserhärte in Gengenbach (Wasseranalyse vom 12.05.2026) · Outdated figure? Tell us